/*!
    \file  i2c.h
    \brief the header file of I2C
    
    \version 2017-02-10, V1.0.0, demo for GD32F30x
    \version 2018-10-10, V1.1.0, demo for GD32F30x
    \version 2018-12-25, V2.0.0, demo for GD32F30x
*/

/*
    Copyright (c) 2018, GigaDevice Semiconductor Inc.

    All rights reserved.

    Redistribution and use in source and binary forms, with or without modification, 
are permitted provided that the following conditions are met:

    1. Redistributions of source code must retain the above copyright notice, this 
       list of conditions and the following disclaimer.
    2. Redistributions in binary form must reproduce the above copyright notice, 
       this list of conditions and the following disclaimer in the documentation 
       and/or other materials provided with the distribution.
    3. Neither the name of the copyright holder nor the names of its contributors 
       may be used to endorse or promote products derived from this software without 
       specific prior written permission.

    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
OF SUCH DAMAGE.
*/

#ifndef I2C_H
#define I2C_H

#include "gd32f30x.h"

#define I2C0_SPEED              100000
#define I2C0_SLAVE_ADDRESS7     0xA0

/* configure the I2C0 interfaces */
void i2c_config(void);

void i2c_byte_write(uint32_t slave_addr, uint8_t write_address, uint8_t buffer);

void i2c_buffer_write(uint32_t slave_addr, uint8_t write_address, uint8_t* p_buffer, uint8_t number_of_byte);

void i2c_byte_read(uint32_t slave_addr, uint8_t read_address, uint8_t* buffer);

void i2c_buffer_read(uint32_t slave_addr, uint8_t read_address, uint8_t* p_buffer, uint16_t number_of_byte);

#endif  /* I2C_H */
